That’s the point. There is nothing to believe because every authoritative source of truth is also pushing an agenda. The best we have is to use a secondary flow of information that “we” are in control of; we already have that in word of mouth. It ultimately just comes down to whether you want to trust the internet people who are “just like you” or the internet people that get to keep their platforms because they lie to you(and these are actually just the same group of people 90% of the time).